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Class Information
Number: 418/270
Name: Rotary expansible chamber devices > Miscellaneous
Description: Subject matter not otherwise provided for.










Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8690556 Rotary compressor and manufacturing method of the same Apr. 8, 2014
8684713 Rotor type pump Apr. 1, 2014
8672659 Vane air motor with prevention of leaking radial bearing grease Mar. 18, 2014
8668478 Compressor having a shutdown valve Mar. 11, 2014
8647084 Cylinder dividing mechanism of a pneumatic tool Feb. 11, 2014
8622725 Mechanical compression ratio changing screw compressor Jan. 7, 2014
8602759 Screw-type vacuum pump having overpressure openings Dec. 10, 2013
8597004 Scroll type compressor having an intercommunication path in which a pin member is inserted Dec. 3, 2013
8585381 Scroll type compressor having an intercommunication path in which a pin member is inserted Nov. 19, 2013
8585382 Compressor having capacity modulation assembly Nov. 19, 2013
8579614 Scroll compressor with three discharge valves, and discharge pressure tap to back pressure chamber Nov. 12, 2013
8556606 Water injection type screw fluid machine Oct. 15, 2013
8556603 Progressing cavity pump adapted for pumping of compressible fluids Oct. 15, 2013
8556922 Motor assembly for a powered surgical instrument Oct. 15, 2013
8535028 Downhole positive displacement motor Sep. 17, 2013
8529234 Water injection type screw fluid machine Sep. 10, 2013
8529235 Oscillating variable displacement ring pump Sep. 10, 2013
8517702 Rotary compressor with enhanced sealing between mode switching device and chamber thereof Aug. 27, 2013
8512019 Screw compression apparatus Aug. 20, 2013
8475148 Scroll compressor having through holes with a set depth Jul. 2, 2013
8459972 Bi-rotational hydraulic motor with optional case drain Jun. 11, 2013
8449276 Variable-speed scroll-type refrigeration compressor May. 28, 2013
8444403 Self-sealing mechanism for scroll compressor May. 21, 2013
8439662 Vane air motor May. 14, 2013
8419394 Hermetic compressor including a backflow preventing portion and refrigeration cycle device having the same Apr. 16, 2013
8393882 Scroll compressor with rotary discharge valve Mar. 12, 2013
8382462 Vane pump with circulating oil supply passage Feb. 26, 2013
8342826 Variable capacity vane pump Jan. 1, 2013
8337185 Rotary compressor having an oil separation plate therein Dec. 25, 2012
8337183 Oil return valve for a scroll compressor Dec. 25, 2012
8322323 Fluid system for oscillating-piston engines Dec. 4, 2012
8287259 Oil-cooled type screw compressor Oct. 16, 2012
8251682 Multi stage rotary expander and refrigeration cycle apparatus with the same Aug. 28, 2012
8251683 Variable capacity rotary compressor Aug. 28, 2012
8235690 Scroll compressor with improved oil separation from refrigerant gas Aug. 7, 2012
8231368 Multi-stage rotary compressor Jul. 31, 2012
8226388 Oil-cooled screw compressor Jul. 24, 2012
8226387 Scroll compressor including lubrication features Jul. 24, 2012
8221103 Fluid motor having improved braking effect Jul. 17, 2012
8202071 Motor-driven scroll type compressor Jun. 19, 2012
8186983 Gas compressor having a check valve May. 29, 2012
8182565 Compressor incorporated with oil separator May. 22, 2012
8172560 Fluid machinery having annular back pressure space communicating with oil passage May. 8, 2012
8167595 Inlet screen and scroll compressor incorporating same May. 1, 2012
8162622 Compressor sound suppression Apr. 24, 2012
8162636 Scroll compressor having partition wall in oil reservoir Apr. 24, 2012
8147229 Motor-compressor unit mounting arrangement for compressors Apr. 3, 2012
8133043 Suction duct and scroll compressor incorporating same Mar. 13, 2012
8128387 Discharge chamber for dual drive scroll compressor Mar. 6, 2012
8128388 Scroll-type expansion machine Mar. 6, 2012

1 2 3 4 5 6 7 8










 
 
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